| 摘要 |
<p>A hat section for a wheel disk has a structure comprising a plurality of curved convex circumferential sections and one or more curved concave circumferential sections. The plurality of curved convex circumferential sections protrude in a curved shape toward the front side, at an inner sloped circumferential section and/or an outer sloped circumferential section of the hat section, and the one or more curved concave circumferential sections are provided between adjacent curved convex circumferential sections and are concave in a curved shape toward the rear side. As a result of this structure, a large increase in rigidity is exhibited due to the shape of the plurality of the curved convex circumferential sections and curved concave circumferential sections, and in general the rigidity and strength of the wheel can be improved. It is therefore possible to increase the running stability of an automobile to which the wheel for an automobile has been fitted.</p> |
